put his shoes on the wrong feet. its worse than it sounds.
give him a hitler stash.
shave half his eye brows.
put ice cubes down his pants
anti mohawk, shave the middle of his head.
put him on a roof.
leave him at a playground somewhere.
oldest trick in the books:
put his hand in warm cup of water, makes yo wet ur pants, aperntely.
rusty hook:
shove your figger up your ass and then hook and drag your finger across the top of his mouth. haha